Finding the Fourth Proportional to 2,012.72, 3,017.04 and 971.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,012.72 : 3,017.04 = 971.20 : x
2. Step 2: Convert to fraction form
   2,012.72/3,017.04 = 971.20/x
3. Step 3: Cross multiply
   2,012.72x = 3,017.04 × 971.20
4. Step 4: Simplify right side
   2,012.72x = 2,930,149.25
5. Step 5: Solve for x
   x = 2,930,149.25/2,012.72
6. Step 6: Final answer
   x = 1,455.82